Question
Express the following in exponential form: $512$
✓
Answer
$512$
$= 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 = 2^9 $
| $2$ | $512$ |
| $2$ | $256$ |
| $2$ | $128$ |
| $2$ | $64$ |
| $2$ | $32$ |
| $2$ | $16$ |
| $2$ | $8$ |
| $2$ | $4$ |
| $2$ | $2$ |
| $1$ |
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→Q.1. Find the total length of the cable purchased by Amar.
(a) 1427 m (b) 1521 m (c) 1605 m (d) 1717 m
Q.2. If the cost of cable is ₹$ 6 \frac{2}{3}$ per metre, find the amount paid by Amar.
(a) ₹ 8830 (b) ₹ 9520 (c) ₹ 10140 (d) ₹ 11280
Q.3. Amarused $2 \frac{1}{2}$ bundles of cable for electric connections in the top floor of the building. What length of cable was used for the top floor?
(a) 476 m (b) 507 m (c) 625 m (d) 712 m
Q.4. Amar cut a length of $13 \frac{4}{5} m$ from a bundle and divided the remaining cable of this bundle into pieces of 21 m, length each. How many pieces of 21 m did he get from this bundle?
(a) 9 (b) 10 (c) 11 (d) 12
Triangle PQR is right-angled at vertex R. Calculate the length of PR, if: PQ = 34 cm and QR = 33.6 cm.